Question

我试图从我使用libnoise改编的世界生成器生成地图图块。使用libnoise保存方法工作正常，但在尝试使用CImg缩放和裁剪图像时，我收到以下错误：

void makeTile(CImg<unsigned char> image, int zoom, int x, int y, int depth, int argc, char* argv[]) {
    std::string directoryBase = "mkdir -p ~/tiles/" + boost::lexical_cast<std::string>(zoom);
    std::string directory = directoryBase + "/" + boost::lexical_cast<std::string>(x);
    std::string filename = "~/tiles/" + boost::lexical_cast<std::string>(zoom) + "/" + boost::lexical_cast<std::string>(x) + "/" + boost::lexical_cast<std::string>(y) + ".bmp";

    const char* file_o = cimg_option("-o", filename.c_str(), "Output file");
    system(directoryBase.c_str());
    system(directory.c_str());
    std::cout << "Made required dirs\n";
    CImg<unsigned char> imageClone = image.get_resize(256, 256, -100, -100, 1);

    std::cout << "scaled image\n";
    imageClone.save(file_o);

    if (depth > 0) {
        int smallX = x * 2;
        int smallY = y * 2;
        makeTile(image.get_crop(0, 0, image._width / 2, image._height / 2), zoom + 1, smallX, smallY, depth - 1, argc, argv);
        makeTile(image.get_crop(image._width / 2, 0, image._width, image._height / 2), zoom + 1, smallX + 1, smallY, depth - 1, argc, argv);
        makeTile(image.get_crop(0, image._height / 2, image._width / 2, image._height), zoom + 1, smallX, smallY + 1, depth - 1, argc, argv);
        makeTile(image.get_crop(image._width / 2, image._height / 2, image._width, image._height), zoom + 1, smallX + 1, smallY + 1, depth - 1, argc, argv);
    }
}

尝试使用CImg保存图像时出错

1 个答案: